Shelley Duvall, born Shelley Alexis Duvall on July 7, 1949, in Fort Worth, Texas, and raised in Houston, was an American actress and producer who left an indelible mark on cinema and children's television with her distinctive screen presence and portrayals of eccentric characters. Initially interested in science, her life took an unexpected turn in 1970 when she was discovered by filmmaker Robert Altman while hosting a party for her boyfriend. Altman, impressed by her upbeat personality, cast her in the black comedy Brewster McCloud that same year, launching one of the most remarkable acting careers of the 1970s. Duvall rose to fame through a series of collaborations with Altman, appearing in the Western McCabe & Mrs. Miller (1971), the crime film Thieves Like Us (1974), and the musical Nashville (1975), establishing herself as a muse of the New Hollywood era.

Duvall received critical acclaim for her performance in Altman's psychological drama 3 Women (1977), which earned her the Cannes Film Festival Award for Best Actress and a nomination for the BAFTA Award for Best Actress. That same year, she had a supporting role in Woody Allen's romantic comedy Annie Hall, cementing her status as one of the most successful actresses of the decade. However, she gained enduring fame for playing Wendy Torrance in Stanley Kubrick's horror film The Shining (1980), a role that has continued to receive intense scrutiny and analysis, with both her performance and the grueling filming experiences becoming legendary in film history. Also in 1980, she played Olive Oyl in Altman's adventure film Popeye, showcasing her versatility as a performer.

The 1980s saw Duvall expand her career into producing, founding the production companies Platypus and Think Entertainment. She created and produced the beloved children's series Faerie Tale Theatre (1982–1987), which adapted classic fairy tales with star-studded casts, as well as Tall Tales & Legends (1985–1987) and Shelley Duvall's Bedtime Stories (1992–1994). These programs earned her Emmy nominations for Outstanding Children's Program and Outstanding Animated Program, as well as a Peabody Award, highlighting her significant contributions to children's media. During this period, she also increased her acting profile by appearing in Terry Gilliam's fantasy film Time Bandits (1981), Tim Burton's short film Frankenweenie (1984), and Fred Schepisi's comedy Roxanne (1987).

In the 1990s, Duvall sold her production companies and acted infrequently, with notable roles in Steven Soderbergh's thriller The Underneath (1995) and Jane Campion's drama The Portrait of a Lady (1996). After playing in Gabrielle Burton's comedy Manna from Heaven (2002), she announced an indefinite hiatus from acting. Her mental health during this period became a subject of media coverage, briefly turning her private life public. Duvall returned to the screen in 2022, announcing a comeback with the independent film The Forest Hills (2023), which would become her final role. Four of her films have been preserved in the National Film Registry by the Library of Congress as culturally, historically, or aesthetically significant. Duvall died of diabetes complications on July 11, 2024, leaving behind a legacy as one of the most unique and beloved figures in American entertainment.